Condensed Consolidated Balance Sheets (Unaudited) - USD ($) $ in Thousands	Apr. 30, 2017	Jan. 31, 2017
Current assets:
Cash and cash equivalents	$ 335,182	$ 322,872
Marketable securities	84,986	82,522
Accounts receivable, net	22,871	38,596
Inventories	19,066	20,145
Restricted cash	9	8
Prepaid expenses and other current assets	3,304	4,392
Total current assets	465,418	468,535
Property and equipment, net	5,241	4,988
Deferred tax assets, non-current	6,028	5,774
Intangible assets, net	13,613	4,149
Goodwill	26,601	26,601
Other non-current assets	2,168	2,224
Total assets	519,069	512,271
Current liabilities:
Accounts payable	18,699	19,955
Accrued and other current liabilities	20,929	26,448
Income taxes payable	555	568
Deferred revenue	5,555	7,425
Total current liabilities	45,738	54,396
Other long-term liabilities	9,002	3,241
Total liabilities	54,740	57,637
Commitments and contingencies (Note 14)	0	0
Shareholders' equity:
Preference shares, $0.00045 par value per share, 20,000,000 shares authorized and no shares issued and outstanding at April 30, 2017 and January 31, 2017, respectively	0	0
Ordinary shares, $0.00045 par value per share, 200,000,000 shares authorized at April 30, 2017 and January 31, 2017, respectively; 33,534,253 shares issued and outstanding at April 30, 2017; 33,369,032 shares issued and outstanding at January 31, 2017	15	15
Additional paid-in capital	219,425	212,276
Accumulated other comprehensive loss	(88)	(70)
Retained earnings	244,977	242,413
Total shareholders’ equity	464,329	454,634
Total liabilities and shareholders' equity	$ 519,069	$ 512,271